X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fstringcodec%2Fjisx0208.cpp;fp=source%2Fstringcodec%2Fjisx0208.cpp;h=6b46b1b679b5a94636e807d350510174eb0eb86f;hp=0000000000000000000000000000000000000000;hb=b42ed73a1b241c0e93ee03c43c4584b41c549bac;hpb=5b1368cb791cab043f0435628cacbaff36e39b7b

diff --git a/source/stringcodec/jisx0208.cpp b/source/stringcodec/jisx0208.cpp
new file mode 100644
index 0000000..6b46b1b
--- /dev/null
+++ b/source/stringcodec/jisx0208.cpp
@@ -0,0 +1,93 @@
+/* $Id$
+
+This file is part of libmspstrings
+Copyright © 2006-2007 Mikko Rasa
+Distributed under the LGPL
+*/
+
+#include "jisx0208.h"
+
+#include "jisx0208.table"
+
+using namespace std;
+
+namespace Msp {
+namespace Codecs {
+
+void JisX0208::Encoder::encode_char(UnicodeChar ucs, string &buf)
+{
+	unsigned short jis = ucs_to_jisx0208(ucs);
+	if(jis)
+	{
+		char jbuf[2] = {jis>>8, jis};
+		buf.append(jbuf, 2);
+	}
+	else
+		error(ucs, buf, "Can't express character in JIS X 0208");
+}
+
+void JisX0208::Encoder::transliterate(UnicodeChar, string &buf)
+{
+	buf.append("!)", 2);
+}
+
+
+UnicodeChar JisX0208::Decoder::decode_char(const string &str, string::const_iterator &i)
+{
+	if(i==str.end())
+		return error("No input");
+
+	string::const_iterator j = i;
+	Kuten jis;
+	jis.ku = *j++-0x20;
+
+	UnicodeChar result;
+	if(j==str.end())
+		result = error("Incomplete JIS X 0208 character");
+	else
+	{
+		jis.ten = *j++-0x20;
+		result = jisx0208_to_ucs(jis);
+		if(result==0)
+			result = error("Undefined JIS X 0208 character");
+	}
+
+	i = j;
+	return result;
+}
+
+
+UnicodeChar jisx0208_to_ucs(Kuten jis)
+{
+	if(jis.ku==0 || jis.ku>0x5E || jis.ten==0 || jis.ten>0x5E)
+		return 0;
+
+	return jisx0208_to_ucs_table[jis.ku*94 + jis.ten - 95];
+}
+
+Kuten ucs_to_jisx0208(UnicodeChar c)
+{
+	if(c<0 || c>0xFFFF)
+		return Kuten();
+
+	unsigned i = 0;
+	for(unsigned bit=0x1000; bit; bit>>=1)
+	{
+		if(i+bit>=ucs_to_jisx0208_table_size)
+			continue;
+		if(ucs_to_jisx0208_table[i+bit].ucs<=static_cast<unsigned short>(c))
+			i += bit;
+	}
+
+	Kuten result;
+	if(ucs_to_jisx0208_table[i].ucs==static_cast<unsigned short>(c))
+	{
+		result.ku = (ucs_to_jisx0208_table[i].jis>>8)+1;
+		result.ten = ucs_to_jisx0208_table[i].jis+1;
+	}
+
+	return result;
+}
+
+} // namespace Codecs
+} // namespace Msp